CN112729519A - Vibration detection system and method for water turbine set - Google Patents
Vibration detection system and method for water turbine set Download PDFInfo
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Abstract
The invention discloses a hydraulic turbine set vibration detection system and a hydraulic turbine set vibration detection method, on one hand, the hydraulic turbine set vibration detection system comprises a power module, a clock module, a communication module and a plurality of data acquisition channels, wherein the data acquisition channels are used for acquiring data obtained by corresponding probes; the acquisition control module is used for controlling the data acquisition channel and sorting the acquired data; the central processing module is used for processing the data after being sorted; the data storage module is used for storing the data processed by the central processing module; the vibration monitoring system provided by the invention is used for carrying out real-time vibration detection on the hydraulic turbine unit, and plays an important role in improving the availability of hydraulic turbine unit equipment, carrying out equipment maintenance in a planned way, improving the water energy utilization rate and the like. After the detection system is used, the normal operation time of the hydraulic turbine set can be increased, the operation condition of equipment is optimized, and the operation safety of the hydraulic generator set is improved.
Description
Technical Field
The invention relates to the technical field of detection of a water turbine set, in particular to a vibration detection system and method of the water turbine set.
Background
The hydraulic turbine is a power machine for converting the energy of water flow into rotary mechanical energy, and belongs to the turbine machinery in fluid machinery. Most of the water turbines are installed in hydropower stations and are used for driving generators to generate electricity. In the hydropower station, water in an upstream reservoir is guided to a water turbine through a water guide pipe, a water turbine runner is pushed to rotate, a generator is driven to generate electricity, and the water which does work is discharged to the downstream through a tail water pipeline. The higher the water head and the larger the flow, the larger the output power of the water turbine is.
The hydraulic turbine unit is in daily use and maintenance, need detect each item oil circuit, water route and electrical data, however machine wearing and tearing that the unit equipment appears, the basis sinks, the part is out of shape, connect not hard up and the dynamic behavior of machine begins to appear various slight changes, if the axle is not centering, the part wearing and tearing, the rotor is unbalanced, cooperation clearance increases etc. most unable direct discovery through the appearance change, consequently, need carry out periodic vibration detection to the unit, with the test through the change of vibration parameter discover the hidden danger that equipment exists, and in time maintain.
However, some extreme conditions, such as locking of the generator shaft due to temperature rise caused by short-time vibration overshoot, cannot be avoided by periodically performing manual vibration detection, and therefore a vibration detection system is needed to monitor the vibration value of the water turbine unit in real time and give an alarm in time when the unit is provided with vibration overshoot.
Disclosure of Invention
The invention aims to provide a system and a method for detecting vibration of a water turbine set, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
in one aspect, the present invention provides a vibration detection system for a hydraulic turbine set, comprising,
a power module, a clock module, a communication module, and,
the data acquisition channels are used for acquiring data obtained by the corresponding probes;
the acquisition control module is used for controlling the data acquisition channel and sorting the acquired data;
the central processing module is used for processing the data after being sorted;
the data storage module is used for storing the data processed by the central processing module;
and the human-computer interaction module is used for watching data and adjusting preset parameters of the vibration monitoring system.
As a further scheme of the invention: the probe includes:
the vibration displacement sensor is used for detecting the vibration displacement of the measured point, and the vibration displacement specifically reflects the magnitude of the vibration amplitude;
the vibration speed sensor is used for detecting the vibration speed of the measured point, and the vibration speed reflects the magnitude of vibration energy;
the vibration acceleration sensor is used for detecting the vibration acceleration of a measured point, and the vibration acceleration reflects the impact force during vibration;
the probe and the corresponding data acquisition channel adopt one of wired communication connection or wireless communication connection.
As a further scheme of the invention: when the probe is in wireless communication connection with the corresponding data acquisition channel, the probe further comprises a storage battery, a power management module, a charging interface and a wireless transmission module, and the acquisition channel comprises a wireless receiving module corresponding to the wireless transmission module.
As a further scheme of the invention: the acquisition control module comprises a channel control submodule and a data sorting submodule, wherein the channel control submodule is used for connecting and controlling each data acquisition channel, and the data sorting submodule is used for receiving and sorting the data acquired by the data acquisition channels in groups.
As a further scheme of the invention: the central processing module comprises a data caching submodule, a data processing submodule and a data output submodule, the data caching submodule is used for caching the pre-arranged data, the data processing submodule is used for analyzing and arranging the cached data, and the data output submodule is used for generating a oscillogram, a spectrogram and a phase diagram according to the processed data and outputting the oscillogram, the spectrogram and the phase diagram to display equipment of the man-machine interaction module.
As a still further scheme of the invention: the alarm module comprises an alarm value setting module and an alarm, wherein the alarm value setting module is used for setting an early warning value for triggering an alarm and an overtime time for triggering the alarm, and the overtime time is the duration of the detection value exceeding the early warning value.
In another aspect, the present invention provides a method for detecting vibration of a turbine assembly, which is performed by the vibration detection system, and includes:
the method comprises the following steps: setting the acquisition frequency, the data display mode, the data display unit, the alarm value and the alarm overtime of the system in unit time through an interpersonal interaction module;
step two: grouping the probes and installing the probes on the surface of equipment, wherein the installation mode is one of magnetic attraction fixation or bolt fixation;
step three: opening a corresponding data acquisition channel, receiving data detected by the probe, and grouping and arranging the received data by the data arranging submodule according to the grouping state of the probe and the vibration displacement magnitude, the vibration speed value and the vibration acceleration value contained in the data;
step four: the data cache submodule caches the pre-arranged data, the data processing submodule analyzes and arranges the cached data, and the data output submodule generates a oscillogram, a spectrogram and a phase diagram according to the processed data and outputs the oscillogram, the spectrogram and the phase diagram to display equipment of the man-machine interaction module.
As a further scheme of the invention: the grouping method of the probes is that every seven probes are grouped.
As a still further scheme of the invention: the installation method of the probes comprises the steps that three probes are respectively installed at the front end of the equipment in the axial direction, the vertical radial direction and the horizontal radial direction of the rotating shaft, the other three probes are respectively installed at the rear end of the equipment in the axial direction, the vertical radial direction and the horizontal radial direction of the rotating shaft, and the last probe is installed at the center of the top of the shell of the equipment.
Compared with the prior art, the invention has the beneficial effects that:
1. the vibration monitoring system provided by the invention is used for carrying out real-time vibration detection on the hydraulic turbine unit, and plays an important role in improving the availability of hydraulic turbine unit equipment, carrying out equipment maintenance in a planned way, improving the water energy utilization rate and the like. After the detection system is used, the normal operation time of the hydraulic turbine set can be increased, the operation condition of equipment is optimized, the maintenance cost of power generation equipment is reduced, and the operation safety of the hydraulic turbine set is improved.
2. By adopting the vibration monitoring system provided by the invention, the maintenance work of the unplanned bearing and the gear can be reduced, and the maintenance based on state monitoring can be carried out; the method can provide a basis for making a maintenance plan, and can more reasonably arrange maintenance; the number of daily inspection on site can be reduced, and the labor intensity of workers is reduced; meanwhile, the production cost is reduced, and the production loss is reduced; reducing secondary damage to the failed component; the service life of the unit is prolonged; the number of spare parts is reduced, and the loss rate is reduced.
Drawings
Fig. 1 is a block diagram of a vibration detection system of a hydraulic turbine set.
Fig. 2 is a block diagram of a central processing module in the vibration detection system of the hydraulic turbine set.
Fig. 3 is a structural block diagram of a probe in the vibration detection system of the hydraulic turbine set.
Fig. 4 is a block diagram of a structure of an acquisition control module in the vibration detection system of the hydraulic turbine set.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
Referring to fig. 1 to 4, in the embodiment of the present invention:
in one aspect, the present invention provides a vibration detection system for a hydraulic turbine set, comprising,
a power module, a clock module, a communication module, and,
the data acquisition channels are used for acquiring data obtained by the corresponding probes;
the acquisition control module is used for controlling the data acquisition channel and sorting the acquired data;
the central processing module is used for processing the data after being sorted;
the data storage module is used for storing the data processed by the central processing module;
and the human-computer interaction module is used for watching data and adjusting preset parameters of the vibration monitoring system.
The probe includes:
the vibration displacement sensor is used for detecting the vibration displacement of the measured point;
the vibration speed sensor is used for detecting the vibration speed of the measured point;
the vibration acceleration sensor is used for detecting the vibration acceleration of the measured point;
the probe and the corresponding data acquisition channel adopt one of wired communication connection or wireless communication connection.
The vibration displacement specifically reflects the magnitude of the vibration amplitude, the vibration velocity reflects the magnitude of the energy, and the vibration acceleration reflects the magnitude of the impact force. It is also believed that in the low frequency range, the vibration intensity is proportional to the displacement; in the medium frequency range, the vibration intensity is in direct proportion to the speed; in the high frequency range, the vibration intensity is proportional to the acceleration.
When the probe is in wireless communication connection with the corresponding data acquisition channel, the probe further comprises a storage battery, a power management module, a charging interface and a wireless transmission module, and the acquisition channel comprises a wireless receiving module corresponding to the wireless transmission module.
The acquisition control module comprises a channel control submodule and a data sorting submodule, wherein the channel control submodule is used for connecting and controlling each data acquisition channel, and the data sorting submodule is used for receiving and sorting the data acquired by the data acquisition channels in groups.
The central processing module comprises a data caching submodule, a data processing submodule and a data output submodule, the data caching submodule is used for caching the pre-arranged data, the data processing submodule is used for analyzing and arranging the cached data, and the data output submodule is used for generating a oscillogram, a spectrogram and a phase diagram according to the processed data and outputting the oscillogram, the spectrogram and the phase diagram to display equipment of the man-machine interaction module.
The alarm module comprises an alarm value setting module and an alarm, wherein the alarm value setting module is used for setting an early warning value for triggering an alarm and an overtime time for triggering the alarm, and the overtime time is the duration of the detection value exceeding the early warning value.
In another aspect, the present invention provides a method for detecting vibration of a turbine assembly, which is performed by the vibration detection system, and includes:
the method comprises the following steps: setting the acquisition frequency, the data display mode, the data display unit, the alarm value and the alarm overtime of the system in unit time through an interpersonal interaction module;
step two: grouping the probes and installing the probes on the surface of equipment, wherein the installation mode is one of magnetic attraction fixation or bolt fixation;
step three: opening a corresponding data acquisition channel, receiving data detected by the probe, and grouping and arranging the received data by the data arranging submodule according to the grouping state of the probe and the vibration displacement magnitude, the vibration speed value and the vibration acceleration value contained in the data;
step four: the data cache submodule caches the pre-arranged data, the data processing submodule analyzes and arranges the cached data, and the data output submodule generates a oscillogram, a spectrogram and a phase diagram according to the processed data and outputs the oscillogram, the spectrogram and the phase diagram to display equipment of the man-machine interaction module.
The grouping method of the probes is that every seven probes are grouped.
The installation method of the probes comprises the steps that three probes are respectively installed at the front end of the equipment in the axial direction, the vertical radial direction and the horizontal radial direction of the rotating shaft, the other three probes are respectively installed at the rear end of the equipment in the axial direction, the vertical radial direction and the horizontal radial direction of the rotating shaft, and the last probe is installed at the center of the top of the shell of the equipment.
By observing the oscillogram, the spectrogram and the phase diagram of the vibration data, the common mechanical faults can be directly judged, such as:
1. the rotor is unbalanced, which is one of the most common faults of the generator with large vibration, and is mostly caused by local damage, falling and the like of parts due to corrosion, scaling, alternating stress action and the like in the running process of the rotor, and the main vibration characteristics of the rotor imbalance are that (1) the vibration direction is mainly radial, and the cantilever type rotor imbalance may show axial vibration; (2) the waveform is a typical sine wave; (3) the vibration frequency is power frequency, and the phase difference of the horizontal vibration and the vertical vibration is close to 90 degrees. (the power frequency is the equipment power frequency vibration frequency, and the calculation method is that the power frequency vibration frequency (Hz) is equal to the running speed (r/min)/60)
2. The rotor is not centered: the rotor misalignment comprises two conditions of misalignment of a shaft system and misalignment of a bearing, wherein the misalignment of the shaft system means that the axes of the rotors are not on the same straight line after the rotors are connected, the misalignment of the bearing means that a journal is deflected in the bearing, the journal is not parallel to the axis of a bearing hole, usually, the misalignment of a multi-finger shaft system is not centered, and the misalignment of the rotors has the main vibration characteristics that (1) the maximum vibration always exists on the bearings at two sides of a misalignment coupling, and the vibration value is increased along with the increase of the load; (2) the parallel misalignment mainly causes radial vibration, the vibration frequency is 2 times of power frequency, and simultaneously, the power frequency and the multiple frequency exist, but the power frequency and the 2 times of power frequency are taken as main parts; (3) the phase difference of radial vibration at two ends of the coupling which are not in parallel alignment is close to 180 degrees; (4) when the angle is not centered, the axial vibration is large, the vibration frequency is power frequency, and the axial vibration phase difference at the two ends of the coupler is close to 180 degrees.
Therefore, the vibration monitoring system provided by the invention is used for carrying out real-time vibration detection on the hydraulic turbine unit, and plays an important role in improving the availability of hydraulic turbine unit equipment, carrying out equipment maintenance in a planned way, improving the water energy utilization rate and the like. After the detection system is used, the normal operation time of the hydraulic turbine set can be increased, the operation condition of equipment is optimized, the maintenance cost of power generation equipment is reduced, and the operation safety of the hydraulic turbine set is improved. The concrete expression is as follows:
(1) the maintenance work of the unplanned bearing and the gear is reduced, and the maintenance based on state monitoring can be carried out;
(2) providing a basis for making a maintenance plan, and more reasonably arranging maintenance;
(3) the daily inspection times on site are reduced;
(4) the production cost is reduced, and the production loss is reduced;
(5) reducing secondary damage to the failed component;
(6) the service life of the unit is prolonged;
(7) the number of spare parts is reduced, and the loss rate is reduced.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. Hydraulic turbine unit vibration detecting system, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a power module, a clock module, a communication module, and,
the data acquisition channels are used for acquiring data obtained by the corresponding probes;
the acquisition control module is used for controlling the data acquisition channel and sorting the acquired data;
the central processing module is used for processing the data after being sorted;
the data storage module is used for storing the data processed by the central processing module;
and the human-computer interaction module is used for watching data and adjusting preset parameters of the vibration monitoring system.
2. The hydraulic turbine assembly vibration detection system according to claim 1, characterized in that: the probe includes:
the vibration displacement sensor is used for detecting the vibration displacement of the measured point;
the vibration speed sensor is used for detecting the vibration speed of the measured point;
the vibration acceleration sensor is used for detecting the vibration acceleration of the measured point;
the probe and the corresponding data acquisition channel adopt one of wired communication connection or wireless communication connection.
3. The hydraulic turbine assembly vibration detection system according to claim 2, characterized in that: when the probe is in wireless communication connection with the corresponding data acquisition channel, the probe further comprises a storage battery, a power management module, a charging interface and a wireless transmission module, and the acquisition channel comprises a wireless receiving module corresponding to the wireless transmission module.
4. The hydraulic turbine assembly vibration detection system according to claim 1, characterized in that: the acquisition control module comprises a channel control submodule and a data sorting submodule, wherein the channel control submodule is used for connecting and controlling each data acquisition channel, and the data sorting submodule is used for receiving and sorting the data acquired by the data acquisition channels in groups.
5. The hydraulic turbine assembly vibration detection system according to claim 1, characterized in that: the central processing module comprises a data caching submodule, a data processing submodule and a data output submodule, the data caching submodule is used for caching the pre-arranged data, the data processing submodule is used for analyzing and arranging the cached data, and the data output submodule is used for generating a oscillogram, a spectrogram and a phase diagram according to the processed data and outputting the oscillogram, the spectrogram and the phase diagram to display equipment of the man-machine interaction module.
6. The hydraulic turbine assembly vibration detection system according to claim 1, characterized in that: the alarm module comprises an alarm value setting module and an alarm, wherein the alarm value setting module is used for setting an early warning value for triggering an alarm and an overtime time for triggering the alarm, and the overtime time is the duration of the detection value exceeding the early warning value.
7. The method for detecting the vibration of the water turbine unit is characterized by comprising the following steps: the vibration detection method is performed by the vibration detection system according to any one of claims 1 to 6, and includes:
the method comprises the following steps: setting the acquisition frequency, the data display mode, the data display unit, the alarm value and the alarm overtime of the system in unit time through an interpersonal interaction module;
step two: grouping the probes and installing the probes on the surface of equipment, wherein the installation mode is one of magnetic attraction fixation or bolt fixation;
step three: opening a corresponding data acquisition channel, receiving data detected by the probe, and grouping and arranging the received data by the data arranging submodule according to the grouping state of the probe and the vibration displacement magnitude, the vibration speed value and the vibration acceleration value contained in the data;
step four: the data cache submodule caches the pre-arranged data, the data processing submodule analyzes and arranges the cached data, and the data output submodule generates a oscillogram, a spectrogram and a phase diagram according to the processed data and outputs the oscillogram, the spectrogram and the phase diagram to display equipment of the man-machine interaction module.
8. The method for detecting the vibration of the hydraulic turbine set according to claim 1, wherein: the grouping method of the probes is that every seven probes are grouped.
9. The method for detecting the vibration of the hydraulic turbine set according to claim 8, wherein: the installation method of the probes comprises the steps that three probes are respectively installed at the front end of the equipment in the axial direction, the vertical radial direction and the horizontal radial direction of the rotating shaft, the other three probes are respectively installed at the rear end of the equipment in the axial direction, the vertical radial direction and the horizontal radial direction of the rotating shaft, and the last probe is installed at the center of the top of the shell of the equipment.
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| CN202110144720.5A CN112729519A (en) | 2021-02-03 | 2021-02-03 | Vibration detection system and method for water turbine set |
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| CN202110144720.5A CN112729519A (en) | 2021-02-03 | 2021-02-03 | Vibration detection system and method for water turbine set |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114993461A (en) * | 2022-08-08 | 2022-09-02 | 成都久和建设设备有限责任公司 | System and method for detecting vibration of motor of tower crane mechanism |
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Application publication date: 20210430 |